Head-gate lock.



Patented May 8, |900. J. L. RHEAD.

HEAD GATE LOCK.

(Aypucation med July 25, 1899.)

2 sheets-snm l.

(No lod-el.)

1u: Nonms PETERS co, PHUro.L|THn., wAsmNooN u c No. 649,355. PatentedMay 8, |900.

J. 'L. RHEAD.

HEAD GATE LOCK. (Appllication led 25, 1899.) (No Model.) Z Sheets-Sheet2` wsEs: v YH /lvvf/vro/ ,a f5 Y JJMLM. m BY Mms; P NJ v AHORA/n.

JOSIAII LEIIS RIIEAD, OF CORINNE, UTAll.

HEAD-GATE LOCK.

SPECIFICATION forming part of Letters Patent No. 649,355, dated May 8,1900.

`pplioation tiled July 2.5, 1899. Serial No. 725,107. (N0 model.) i

fr; wit wit/mt it 11i/(ffy conceive:

Be it known that I, JosIAH LEWIS RHEAD, of Corinne, in the county of BoxElder and State of Utah, have invented a new and useful Improvement inHead Gate Locks, of which the following is a specification.

My invention relates to locking devices for the head-gates of irrigatingditches, canals,

flumes, and waterways constructed in such a manner as to properlyprotect the interests of both the supply companyand the consumer whouses the water. It is desirable in the interests of the company that thehead-gate should not be opened more than a limited distance to admit theamount ot' water which the consumer contracts for, and yet the consumerfrequently desires to be able to cut off the water or reduce its flow.Ii a gate is locked at the maximum opened position allowed by the supplycompany, the consumer has no control over the flow except by a secondindependent gate. My invention is designed to provide a single gatewhich may be locked by the supply company at its limited opened positionand yet be perfectly under the control of the consumer in every range ofadjustment less than the maximum and down t0 the point of closure 5 andto this end my invention consists in the mechanism hereinafter shown anddescribed, reference being had to the accompanying drawings, in which-Figure l is a perspective View; Fig. 2, a sectional detail; Fig. 3, asectional elevation transversely to the ume, showing a modification ofthe invention; and Fig. a is a front view in elevation, showing anothermodification.

In the drawings, A is the boxing or sluiceway of the irrigating ditch orcanal, on opposite sides of which are erected the vertical standards F,having guideways d on theirinner faces and cross-beams Gr and Hconnecting their tops.

I is the gate, sliding vertically in the guides d and formed of twothicknesses of planking, between which is bolted the lower flattened endB/ of a vertical screw-stem B, arranged rigidly in the vertical centralline of the gate. In adjusting the gate the screw-stem B rises and fallswith the gate, passing through opening t' in the top cross-bar when up;but said stem does not revolve. It is raised and lowered by a hand-wheelE, whose hub is interiorly threaded like a nut and tits into or mesheswith the screw-thread of the stem B. This screw-nut wheel turns betweentwo metal plates D D, arranged on the adjacent faces of the twocross-beams G l-I, so that as the wheel is turned it cannot movevertically itself, but raises or lowers the screw-stem B and theattached gate I in the guides d.

C is an arm with a perforated head at one end, which is screw-threadedinteriorly to mesh with the screw-stem B, which passes through it. Theother end of this arm C is anchored to a chain a, which in turn isconnected to an eyebolt Z) by means of a padlock, the key of which is inthe control-of the supply company. The eyebolt h passes through only aportion of the standards F, which places the nut between timbers toprevent its being tampered with. The chain prevents the arm C fromrotating on the screw-stem, and hence when the stem and gate rise thearm C acts as a stop by striking against a metal plate Dl on the lowerside of the crossbar H, as shown in Fig. 2, so as to prevent the gatefrom being raised over the allowed height, and yet the water-consumermay by reason of the slack of the chain turn the wheel E and adjustdownwardly the screw-stem B, arm C, and gate l to any degree of reduceddow orcomplete closure, if desired. By un-V locking the padlock andturning the arm C up or down on the screw-stem the supply company mayset the stop-arm C at any point along the length of the screw-stem todetermine the maximum flow allowed to each consumer.

As a modification of my invention I may, as in Fig. 3, substitute astop-wheel C for the arm C, and I may dispense with one of thecross-bars at the top and arrange a handwheel E above the singlecross-beam. In such case the hub of this wheel is flanged at e', and itsflange swivels beneath semicircular overhanging collar-plates G, boltedthrough a face-plate 0n top of the cross-beam, or, as in Fig. 4, a chaina2 with suflicient slack in it may be anchored to the top of thescrew-rod B, so as to limit the upward movement of the same, and yetallow the gate to be closed.

In describing the wheel E of my invention I have for convenience calledit a screw-nut TOO Wheel; but I Would have it understood that it is infunction a sWiveling screw-nut, and I may construct it in any desiredform or size suitable for convenient turning.

I-Iaving thus described my invention, what I claim as new, and desire tosecu re byLetters Patent, is

l. A head-gate-locking mechanism, comprising a gate moving in guidewaysand having a screw-stem attached to the same so that it cannot turn, ascrew-nut Wheel meshing with the screw-stem but restrained as againstlongitudinal movement, and a stop device for limiting the openingmovement of the gate and screw-stem substantially as described.

2. A head-gate-locking mechanism, comprising-vertical standards withguideways, a gate moving in said guideways and having a screw-stemattached to the same so that it cannot turn, a screw-nut wheel meshingwith saidscreW-stem, two cross-bars one above and the other below saidscrew-'nut Wheel, and a stop device for limiting the opening movement ofthe gate and screw-stem substantially as described.

3. A head-gate-locking mechanism, comprising a gate moving in guidewaysand having a screw-stem attached to the same so it cannot turn, ascrew-nut Wheel meshing With the screw-stem but restrained againstIongitudinal movement, an adjustable screwthreaded stop device embracingand meshing with the screw-stem, and a chain and locking anchorage forthe same to prevent the stop device from being turned up or down on thescrew-stem substantially as described.

4. A head-gate-locking mechanism comprising a gate moving in guidewaysand having a screwstem attached to the same so it cannot turn, ascrew-nut wheel meshing with the screw-stem but restrained as againstlon gitudinal movement, an arm with a perforated screw threaded endembracing the screw-stem, a loose chain attached to said arm, and a lockfor the chain substantially as and for the purpose described.

JOSIAH LEWIS RHEAD.

Witnesses:

O. PETERsEN,

H. J. RICH.

